82020020 has 24 divisors (see below), whose sum is σ = 172972800. Its totient is φ = 32668832.

The previous prime is 82020007. The next prime is 82020031. The reversal of 82020020 is 2002028.

It is a junction number, because it is equal to n+sod(n) for n = 82019977 and 82020004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3800 + ... + 13359.

It is an arithmetic number, because the mean of its divisors is an integer number (7207200).

Almost surely, 2^82020020 is an apocalyptic number.

It is an amenable number.

82020020 is an abundant number, since it is smaller than the sum of its proper divisors (90952780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82020020 is a wasteful number, since it uses less digits than its factorization.

82020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17407 (or 17405 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 82020020 is about 9056.4904902506. The cubic root of 82020020 is about 434.4835020086.

Adding to 82020020 its reverse (2002028), we get a palindrome (84022048).

The spelling of 82020020 in words is "eighty-two million, twenty thousand, twenty".